When I went to Leeds a couple of years ago I had to deal with a handling agent because I was going onto the main apron to pay my landing fee. All that happened was that whilst I was taxiing, a bloke came out waving his ping-pong bats - presumably wanting a game. I tried to run him over and after I'd stopped he mooched off inside and that was that. I didn't have to pay for this, but I think that's what you would pay your £15 for.
Bargain!